Optical waveguides – Polarization without modulation
Patent
1995-08-11
1997-05-13
Bovernick, Rodney B.
Optical waveguides
Polarization without modulation
385 28, 385 29, G02B 626
Patent
active
056299915
ABSTRACT:
A method is provided for reducing the polarization shift between different modes of an optical signal propagating in an optical grating having a plurality of waveguides extending in a common plane. The method includes the step of imparting curvature to the optical grating along a line that traverses the plurality of waveguides in a direction that is substantially perpendicular to the direction in which the optical signal propagates. The curvature varies in a nonuniform manner along the line to which it is imparted. The curvature may vary in a substantially linear manner along this line, which in some cases may define a symmetry axis of the grating. Sufficient curvature may be imparted to substantially eliminate the polarization shift. The curvature may be imparted by flexing the optical grating at two contact points respectively located near a longest and shortest of the plurality of waveguides.
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Bovernick Rodney B.
Lucent Technologies - Inc.
Mayer Stuart H.
Song Yisun
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